<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 4、打印1-100中7的倍数 和 带7的数字（7,14,17,21,27,28.....）

        for(var j = 1 ; j < 100 ; j++ ){
            if( j % 7 === 0 || j % 10 === 7 || parseInt( j / 10) === 7){
                console.log(j)
            }
        }
    </script>
</body>
</html>